Mercedes-Benz C43 vs Aston Martin DB11

What's the difference?

The new AMG C 43 may lack the drama and excitement we’ve come to expect from the German performance brand, but that doesn’t mean it’s a bad car. Yes, it could be more extroverted and the ride could be improved, but this is still a sharp-looking sports sedan with loads of punch.

This is a car that speaks to its times, with ever-stricter emissions regulations making it harder and harder for car companies to produce loud, wild and charismatic cars. So Mercedes-AMG has worked within those boundaries and come up with a car that retains at least some of those core elements that has made the brand so desirable over the years.

Note: CarsGuide attended this event as a guest of the manufacturer, with accommodation and meals provided.

The Aston Martin DB11 AMR is fast, capable and beautiful. It has a unique character and charisma its Italian and German competitors can’t match. That said, some important media and safety-tech features are absent. So, it’s not perfect... just brilliant.

Mercedes has created something of a problem for itself with its decision to introduce AMG styling packages for the majority of its range, including the C-Class.

It means the C 43 has to walk a fine line between looking like a unique AMG model, rather than just a C300 with a bodykit and not out-doing the C63.

To that end it has AMG’s now familiar grille with vertical bars, the unique and complex-looking 20-inch alloy rims and a small lip spoiler on the boot. But otherwise it is surprisingly understated for an AMG, lacking the more obvious and muscular stance of previous AMG offerings.

Inside, there’s a similar theme, with the typical Mercedes-Benz luxury appointments but with a sportier, AMG twist. The steering wheel is chunky and comes with AMG branding, metallic shift paddles and a pair of rotary dials/buttons that allow you to alter the various drive modes and settings.

The one on the right allows you to switch between the pre-set Comfort, Sport, Sport+ and Individual modes, while the one on the left can scroll between the various individual aspects to tailor the settings to the conditions.

In typical modern fashion the design is tech-laden, with a digital display for the instrument panel (that can be switched between various graphics) and a large, tablet-style central multimedia touchscreen that controls the majority of the car’s non-driving functions.

For a while there it looked like Aston Martin had fallen into the ‘everything looks the same’ trap, with Ian Callum’s breakthrough DB7 design in the mid-‘90s writing the script for the DB9 that followed, and heavily influencing everything else in the brand’s subsequent portfolio.

But in 2014, Aston’s design chief Marek Reichman sent a message with the DB10 Concept that things were about to change.

James Bond had Q and MI6 to thank for his DB10 company car in Spectre, but real-world Aston Martin customers were soon offered the DB11, which combined the muscularity of Reichman’s work on the ultra-exclusive One-77 from a decade earlier with the swooping, long-nosed proportions of his track-only Vulcan hypercar.

The hallmark of a well executed 2+2 GT is that it looks bigger in photos than it does in reality, and the DB11 is a perfect case in point.

Appearing limo-sized in our accompanying images, the DB11 is in fact 34mm shorter end-to-end than a Ford Mustang, but it’s exactly 34mm wider, and no less than 91mm lower in overall height.

And as any fashionista worth their salt will tell you, dark colours are slimming, and our ‘Onyx Black’ AMR, with gloss black 20-inch forged rims and black ‘Balmoral’ leather interior accentuated the car’s tightly drawn, shrink-wrapped surface treatment.

Signature elements in the shape of a broad, tapering grille, divided side vents, and sharply curved, two-level (smoked) tail-lights clearly identify the DB11 as an Aston Martin.

But the smooth integration of the car’s broad haunches (very One-77), gently tapering turret (optional exposed carbon) and flowing bonnet is masterful and fresh. The dash-to-axle ratio (the distance from the base of the windscreen to the front axle line) is Jaguar E-Type-esque.

And it’s all subtly aero-efficient, For example, the door handles fit flush to the body, the mirror housings double as mini ‘wings’, and the Aston Martin ‘Aeroblade’ system channels air running from carefully crafted openings at the base of the C-pillar, through the rear of the car to generate downforce (with minimal drag) across a lateral vent on the trailing edge of the bootlid. A small flap rises at “high speed” when more stability is required. 

The interior is all business, with a simple instrument binnacle showcasing a central 12.0-inch digital speedo-within-tacho combination, flanked by configurable engine, performance and media read-outs on either side.

Aston has form with squared-off steering wheels and the DB11’s is flat on the bottom and decidedly straight on the sides, affording a clear view of the gauges without compromising purpose. A leather and Alcantara trim combination is (literally) a nice touch. 

The teardrop-shaped centre stack sits in a slightly recessed section (optionally) lined with ‘carbon-fibre twill’, while the form and function of the 8.0-inch multimedia screen at the top will be immediately familiar to current Mercedes-Benz drivers, as the system, including the console mounted rotary controller and touchpad, is sourced from the three-pointed-star brand.

A band of proudly illuminated buttons across the centre includes gear settings for the transmission and a winged stop-starter in the middle. Strange, then, that the plastic knobs on the adjustable air vents look and feel so cheap and bland. This a $400k-plus Aston Martin, where’s the knurled alloy? 

Other highlights include elegant sports seats trimmed in a combination of premium leather and Alcantara. Aston offers various levels of leather and our car’s black ‘Balmoral’ hide is taken from the top shelf.

The key accent colour inside and out on our test example was a screaming lime green, picking out the brake calipers, centre strips on the seats, and contrast stitching throughout the cabin. Sounds awful, looks amazing.  

The new C-Class has grown slightly in size compared to the model it replaces, most notably with a 26mm increase in the wheelbase which you can feel in the cabin.

The front seat space is good, with excellent adjustability for the power-adjustable seats and steering column. I had no trouble finding my ideal seating position which makes for a more enjoyable and uncompromised driving experience.

Rear space is a bit tighter (which is typical for this segment/size of vehicle), but thankfully the standard seats do have very deep sculpting in the backs which allow for more knee space and foot room.

However, at approximately 180cm (six-foot), I wouldn’t like to sit behind my seating position for long periods as my knees were touching the seat back, and headroom is compromised with the panoramic glass roof.

In terms of small item storage there’s a lidded console box in between the front seats as well as a pair of cupholders and a small tray where you can place your mobile phone.

It’s worth noting, though, that early examples of the C 43 in Australia do not have a wireless smartphone charging pad, with that reportedly being introduced from February production.

While that’s good news, it’s not really competitive in this day and age to offer a car costing six-figures without such technology.

There’s also only a single USB-C power outlet in the front, which is another disappointment, but there is a pair in the back.

Mercedes does win some points back for a respectable 455-litre boot, which has a nice wide load opening that will make packing luggage easier.

On one hand it’s hard to describe a supercar like the DB11 as practical when its primary purpose is to go ridiculously fast and look incredibly good in the process.

But this is, in fact, a ‘2+2’ GT, meaning a couple of occasional seats have been squeezed behind the front pair to allow obliging contortionists, or more likely small children, to enjoy the ride.

No one is claiming full four-seat capacity, but it’s a trick that has for decades made cars like Porsche’s 911 a more practical choice for high-end, high-performance sports car buyers.

At 183cm I can verify the chronically limited space back there, without anything in terms of connectivity, specific ventilation or storage options provided. Good luck, kids.

For those up front it’s a very different story. First, the doors are hinged to move up slightly as they swing out, which makes entry and egress a more civilised process than it might otherwise be. That said, those doors are still long, so it pays to pre-plan a workable parking spot, and the high-mounted, forward-facing interior release handles are awkward to use.

Storage runs to a box between the seats, complete with a two-stage electrically controlled lid, housing a pair of cupholders, an oddments space, two USB inputs and an SD card slot. Then, there are slim pockets in the doors, and that’s about it. no glove box or netted pouches. Just a small tray for coins or the key in front of the media controller.

And speaking of the key, it’s another strangely underwhelming part of the DB11 AMR’s presentation. Plain and insubstantial, it looks and feels like the key to an under-$20k budget special, rather than the heavy, polished and glamorous item you’d expect to be subtly placing on the table in your preferred three-hat restaurant.

The carpet-lined boot measures 270 litres, which is enough for some small suitcases and a soft bag or two. In fact, Aston Martin offers a four-piece accessory luggage set “expertly tailored to match the car’s specification.”

Don’t bother looking for a spare wheel, an inflator/repair kit is your only option in the case of a puncture.

Head into the $400k new car zone and expectations are understandably high. The DB11 AMR’s is a continent-crushing GT after all, and you want your fair share of luxury and convenience features to go with its huge performance potential.

For $428,000 (plus on-road costs), as well as the safety and performance tech (of which there’s plenty) covered in later sections, you can expect a lengthy standard features list, including a full-grain leather interior (seats, dash, doors, etc), Alcantara headlining, multi-function ‘Obsidian Black’ leather-trimmed steering wheel, electrically adjustable and heated front seats (with three memory positions), heated/folding exterior mirrors, front and rear parking sensors, and 360-degree ‘Surround View’ parking cameras (including front and rear cameras).

Also standard are cruise control (plus speed limiter), sat nav, dual-zone climate control, the electronic instrument cluster (with mode-specific displays), keyless entry and start, a multi-function trip computer, 400-Watt Aston Martin audio system (with smartphone and USB integration, DAB digital radio and Bluetooth streaming), plus the 8.0-inch touch-control multimedia screen.

Then there are LED headlights, tail-lights and DRLs, ‘dark’ grille, headlight bezels, and tailpipe finishers, 20-inch forged alloy rims, carbon-fibre bonnet vent blades and side strakes, dark anodised brake calipers and, to reinforce the car’s motorsport DNA, the AMR logo sits on the door sill plates and is embossed on the front-seat headrests.

Apple CarPlay and Android Auto functionality is a surprising omission, but our test car more than made up for it with a motherload of optional extras including an exposed carbon-fibre roof panel, roof strakes and rear-view mirror caps, as well as ventilated front seats, the vivid ‘AMR Lime’ brake calipers, plus a ‘Dark Chrome Jewellery Pack’ and ‘Q Satin Twill’ carbon-fibre trim inlays to add presence in the cabin. Along with some other bits and pieces this adds up to an as-tested total of $481,280 (before on-road costs).

The biggest talking point about this new car is the engine, with AMG downsizing from the old C 43’s six-cylinder to a 2.0-litre four-cylinder turbocharged petrol engine.

But it’s not just any turbocharged four-pot, because it is fitted with technology that Mercedes claims has been inspired directly from its Formula One team.

While the F1 team engine facility is based in England, this engine was designed and developed by the Mercedes-AMG team at its Affalterbach headquarters, but the concept of the electric turbocharger reportedly comes from the engine that powered Lewis Hamilton to multiple world championships.

The electric exhaust gas turbocharger - to give it its official name - uses a small electric motor on the turbocharger shaft to spin up the blades without having to wait for any exhaust gases to pass through it first.

To power the electric turbo the C 43 is equipped with a mild-hybrid 48-volt electrical system.

Mercedes claims this means reduced lag and improved throttle response for a sportier driving experience. 

It also helps make this small engine produce big amounts of performance, with AMG extracting 300kW of power and 500Nm of torque from this 2.0-litre, which is more power than the previous six-cylinder C 43 managed.

The engine is paired to a nine-speed multi-clutch transmission, which isn’t a dual-clutch with a pair of clutches operating on every second gear ratio, but instead uses a “wet start-off clutch” for better take-offs and smoother shifting on the move (at least in theory).

Power is sent to the road via all four wheels thanks to Mercedes’ 4Matic all-wheel drive system.

The DB11 AMR’s (AE31) 5.2-litre, twin-turbo V12 is an all-alloy unit, tuned to deliver 470kW (up 22kW on the old model) at 6500rpm, while retaining the previous DB11’s 700Nm of maximum torque from 1500rpm all the way to 5000rpm.

As well as dual variable camshaft timing, the engine features a water-to-air intercooler and cylinder deactivation, which allows it to run as a V6 under light loads.

Drive goes to the rear wheels via a ZF-sourced eight-speed (torque converter) auto transaxle with column-mounted paddles, recalibrated for faster shifting in more aggressive Sport and Sport+ modes. A limited-slip differential is standard.

Despite the smaller engine you can hardly call the C 43 miserly, with a claimed combined urban/highway cycle rating of 9.1-litres per 100km. That’s only a 0.2L/100km improvement over the old six-cylinder.

On test, which included a return trip from Sydney to Bathurst via motorways and some dynamic back road driving, we saw a return of 11.8L/100km on the car's onboard computer.

While hardly hybrid-worrying, it’s impressive to think that driven modestly, such a potent engine can return a single-digit fuel figure.

Minimum fuel requirement for the DB11 AMR is 95 RON premium unleaded and you’ll need 78 litres of it to fill the tank.

Claimed economy for the combined (ADR 81/02 - urban, extra-urban) cycle is 11.4L/100km, the big V12 emitting 265g/km of CO2 in the process.

Despite standard stop-start and cylinder deactivation tech, in roughly 300km of city, suburban and freeway running we recorded a figure exactly nothing like that, according to the on-board computer we more than doubled the claimed number on ‘spirited’ drives. The best average figure we saw was still in the high teens.

Let’s start with the good news. The new Mercedes-AMG C 43 is a quick car. The engine may be small in size but the electric turbocharger does its thing and provides plenty of punch.

You can get a performance boost, too, thanks to the belt-driven starter generator, which acts as a mild hybrid and gives you a surge of 10kW for a brief period if you need a sudden burst of extra speed.

The chassis is well-sorted, too, at least from a dynamic point-of-view. The rear-wheel steering can provide up to 2.5 degrees of turning, which improves handling at speed and manoeuvrability when parking.

However, there are some less-impressive elements to the C 43, too. The obvious one is the drama, or rather the lack thereof.

As I said at the beginning, the C 43 has never been as wild or raucous as the V8-powered C 63, but when you buy an AMG there’s a rightful expectation that it will provide some thrills.

The C 43 simply doesn’t have that character about it. Yes, it’s fast, but it produces that speed with efficiency rather than excitement.

And it’s not an engine size problem, because even the 2.0-litre four-cylinder A 35 and CLA 35 offer more ‘wow factor’ than the C 43.

Yes, the engine makes noise under acceleration (and it can be altered between discreet and sporty) but even at its best it sounds muted and lacks the evocative tone of a V8 or six-cylinder engine. 

Another disappointment is the transmission calibration, with the gearbox awkwardly shifting out of first gear on multiple occasions during our test drive.

In the taller gears it felt smooth enough cruising along, but given its low speed shifts we’d like to spend more time in the urban environment before passing final judgement. 

The other notable element of the driving experience we struggled with was the ride quality. While fine on the smoother motorways, our test drive included time on some patchy country back roads and the C 43, even in the ‘Comfort’ suspension setting, was simply too firm.

Riding on low profile tyres, the adaptive dampers struggled to isolate the cabin from the imperfections in the road, leading to a fussy ride at times.

Overall the C 43 is a good car, but it feels like there are still some areas where Mercedes could improve it to make it really live up to the AMG badge.

The moment you press the starter the DB11 begins a theatrical performance worthy of the Royal Shakespeare Company.

A high-pitched whine reminiscent of a Formula One air-starter precedes a raucous blast of exhaust noise as the twin-turbo V12 bursts into life. 

It’s spine-tingling, but for those wanting to remain on good terms with their neighbours a quiet-start setting is available.

At this point, rocker buttons on either side of the steering wheel set the tone for what follows. The one on the left, marked with a shock-absorber graphic, allows you to scroll the adaptive damping set-up through Comfort, Sport, and Sport+ settings. Its ‘S’ branded partner on the right facilitates a similar trick with the drivetrain. 

So, throwing urban serenity out the window, we pushed into maximum attack mode for the engine, and by extension the exhaust, selected D and began to enjoy the first act.

A launch-control function is standard, so purely in the interests of science we explored its function and can confirm it works exceptionally well.

Aston claims the DB11 AMR will accelerate from 0-100km/h in just 3.7sec, which is properly fast, and two tenths of a second faster than the standard DB11 it replaces. 

Keep the pedal pinned and two things will happen; you’ll reach a maximum velocity of 334km/h and generate headline news across the country while making your way directly to jail.

With 700Nm available from just 1500rpm, and remaining on tap to 5000rpm, mid-range thrust is monumental and the thundering exhaust note accompanying it is the stuff automotive dreams are made of.

Peak power of 470kW (630hp) takes over at 6500rpm (with the rev ceiling sitting at 7000rpm) and delivery is impressively linear, without a hint of turbo hesitation.  

Aston claims the DB11 AMR will accelerate from 0-100km/h in just 3.7sec, which is properly fast.

The eight-speed auto is simply superb, picking up gears at just the right point and holding on to them for exactly the right amount of time. Select manual mode and the slender shift levers on either side of the steering column allow even more control.

In Sport and Sport+ drivetrain modes the howling exhaust is accompanied by an entertaining array of pops and bangs on up and down shifts. Bravo!

The DB11 AMR is underpinned by an ultra-stiff bonded aluminium chassis, with a double wishbone front/multi-link rear suspension set-up attached to it.

Spring and damper rates are unchanged from the previous DB11 and even on enthusiastic back-road runs we found suspension in Comfort and driveline in Sport+ to be the best combination. Flicking the shocks into Sport+ is best kept for track days. 

Steering is (speed dependent) electrically power-assisted. It’s beautifully progressive, yet pin-sharp with excellent road feel.

The big 20-inch forged alloy rims are shod with high-performance Bridgestone Potenza S007 rubber (255/40 front – 295/35 rear), developed as original equipment for this car and Ferrari’s F12 Berlinetta.

They combine with the 1870kg DB11’s near perfect 51/49 front to rear weight distribution and standard LSD to deliver confidence-inspiring balance and ferocious power down on (quick) corner exit.

Braking is handled by huge (steel) ventilated rotors (400mm front – 360mm rear) clamped by six-piston calipers at the front and four-piston at the rear. We might have put them under decent pressure from time-to-time, but stopping power remained prodigious and the pedal firm.

In the calm of urban traffic the DB11 AMR is civilised, quiet (if you prefer) and comfortable. The sports seats can be adjusted to grip like a vice at speed or provide more breathing room around town, the ergonomics are spot-on, and despite its striking looks, all around vision is surprisingly good.

Overall, driving the DB11 AMR is a special event, flooding the senses and raising the heart rate no matter what the speed.

Big speed demands serious active and passive safety, and the DB11 comes up short on the former.

Yes, there’s ABS, EBD, EBA, traction control, Dynamic Stability Control (DSC), Positive Torque Control (PTC) and Dynamic Torque Vectoring (DTV); even a tyre-pressure monitoring system, and the surround view cameras.

But more recent crash-avoidance tech like active cruise control, bling-spot monitoring, lane-departure warning, rear cross traffic alert, and especially AEB, are nowhere to be seen. Not great.

But if a crash is unavoidable there’s plenty of back-up in the form of dual-stage driver and passenger front airbags, front side (pelvis and thorax) airbags, as well as curtain and knee airbags.

Both rear-seat positions offer top tethers and ISOFIX anchors for baby-capsule and child-seat location.

The DB11 hasn’t been assessed for safety performance by ANCAP or EuroNCAP. 

The C 43 is covered by Mercedes’ five-year, unlimited kilometre warranty, which has become the new standard for the luxury car market.

Service intervals for the car are at 12 months/25,000km, which is on par with industry standard.

Mercedes-Benz Australia will offer a service plan for the C 43, prices were yet to be confirmed at the time of publication but the company has indicated it will be similar to the C300. 

That means $550 for year one, $900 for year two, the third service costs $1000 and the fourth year service costs $2450 - for a total of $4900 for the first four years of ownership.

While Kia leads the mainstream market with a seven-year/unlimited km warranty, Aston Martin sits further back with a three-year/unlimited km deal. 

Servicing is recommended every 12 months/16,000km, and an extended, transferable 12-month contract is available, including everything from provision of a taxi/accommodation in the event of breakdown, to coverage of the vehicle at “official Aston Martin organised events.”